package com.ws.base.util;

import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.os.Build;
import android.os.Environment;
import android.os.Looper;
import android.util.Log;
import android.widget.Toast;

import java.io.File;
import java.io.FileOutputStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.reflect.Field;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

/**
 * 错误日志工具类
 * FIXME
 */
public final class CrashUtil implements Thread.UncaughtExceptionHandler {

    public final String TAG = CrashUtil.class.getSimpleName();

    private Context context;
    private Thread.UncaughtExceptionHandler mDefaultHandler;

    // 用来存储设备信息和异常信息

    private Map<String, String> infos = new HashMap<String, String>();

    // 用于格式化日期,作为日志文件名的一部分

    private DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");

    public CrashUtil(Context ctx) {
        //获取系统默认的UncaughtException处理器
        mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();
        this.context = ctx;
        collectDeviceInfo(context);
    }

    @Override
    public void uncaughtException(Thread thread, Throwable ex) {
        if (!handleException(ex) && mDefaultHandler != null) {
            //如果用户没有处理则让系统默认的异常处理器来处理
            mDefaultHandler.uncaughtException(thread, ex);
        } else {
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                Log.e(TAG, "error : ", e);
            }
//            Intent intent = new Intent(application.getApplicationContext(), MainActivity.class);
//            PendingIntent restartIntent = PendingIntent.getActivity(
//                    application.getApplicationContext(), 0, intent,
//                    Intent.FLAG_ACTIVITY_NEW_TASK);
            //退出程序
//            AlarmManager mgr = (AlarmManager) application.getSystemService(Context.ALARM_SERVICE);
//            mgr.set(AlarmManager.RTC, System.currentTimeMillis() + 1000,
//                    restartIntent); // 1秒钟后重启应用
//            application.exit();
        }
    }

    /**
     * 自定义错误处理,收集错误信息 发送错误报告等操作均在此完成.
     *
     * @param ex
     * @return true:如果处理了该异常信息;否则返回false.
     */
    private boolean handleException(final Throwable ex) {
        if (ex == null) {
            return false;
        }
        Log.e(TAG, ex.toString());

        //使用Toast来显示异常信息
        new Thread() {
            @Override
            public void run() {
                sendCrashInfo2Mail(ex);
                Looper.prepare();
                ToastUtil.showShort(context, "很抱歉,程序出现异常,即将退出.");
                Looper.loop();
            }
        }.start();
        return true;
    }


    /**
     * 收集设备参数信息
     *
     * @param ctx
     */

    public void collectDeviceInfo(Context ctx) {

        try {

            PackageManager pm = ctx.getPackageManager();

            PackageInfo pi = pm.getPackageInfo(ctx.getPackageName(),
                    PackageManager.GET_ACTIVITIES);

            if (pi != null) {

                String versionName = pi.versionName == null ? "null"
                        : pi.versionName;

                String versionCode = pi.versionCode + "";
                infos.put("versionName", versionName);

                infos.put("versionCode", versionCode);

            }

        } catch (PackageManager.NameNotFoundException e) {

            LogUtil.e("an error occured when collect package info");

        }

        Field[] fields = Build.class.getDeclaredFields();

        for (Field field : fields) {

            try {

                field.setAccessible(true);

                infos.put(field.getName(), field.get(null).toString());

                LogUtil.e(field.getName() + " : " + field.get(null));

            } catch (Exception e) {
                LogUtil.e("an error occured when collect crash info");
            }
        }
    }

    /**
     * 保存错误信息到文件中
     *
     * @param ex
     * @return 返回文件名称, 便于将文件传送到服务器
     */

    private String sendCrashInfo2Mail(Throwable ex) {
        StringBuffer sb = new StringBuffer();
        for (Map.Entry<String, String> entry : infos.entrySet()) {
            String key = entry.getKey();
            String value = entry.getValue();
            sb.append(key + "=" + value + "\n");

        }

        Writer writer = new StringWriter();

        PrintWriter printWriter = new PrintWriter(writer);

        ex.printStackTrace(printWriter);

        Throwable cause = ex.getCause();

        while (cause != null) {

            cause.printStackTrace(printWriter);

            cause = cause.getCause();

        }

        printWriter.close();

        String result = writer.toString();

        sb.append(result);

        try {
            long timestamp = System.currentTimeMillis();
            String time = formatter.format(new Date());
            String name = "crash-";
//            if(AlumniApplication.getInstance().DEBUG){
//                name += "testing-";
//            }
//            MailSender.getInstance().send("receive@xiaoyou.com", name + time + "-" + timestamp, sb.toString());
            String fileName = "crash-" + time + "-" + timestamp + ".log";
            if (Environment.getExternalStorageState().equals(
                    Environment.MEDIA_MOUNTED)) {

                String path = Environment.getExternalStorageDirectory().getAbsolutePath()
                        + "/crash/";
                if (!Environment.getExternalStorageState().equals(
                        Environment.MEDIA_MOUNTED)) {
                    path = Environment.getRootDirectory().getAbsolutePath() + "/crash/";
                }
                File dir = new File(path);
                if (!dir.exists()) {
                    dir.mkdirs();
                }
                FileOutputStream fos = new FileOutputStream(path + fileName);
                fos.write(sb.toString().getBytes());
                fos.close();
            }
            return fileName;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }
}
